Crescimento da alface sob saturação temporal do solo

Nobre, Reginaldo Gomes; Fernandes, Pedro Dantas; Gheyi, Hans Raj; Brito, Marcos Eric Barbosa; Silva, Luanna A. da

doi:10.1590/s1415-43662009000700011

Cited by 3 publications

(2 citation statements)

References 11 publications

(13 reference statements)

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“…The quadratic characteristic presented in the work of these authors for the variables fresh mass of aerial part and dry mass of aerial part, may have occurred by the accumulation of moisture in the soil, because according to Nobre et al (2009), a high water content in the soil negatively influences the accumulation of phytomass in the lettuce crop.…”

Section: Resultsmentioning

confidence: 99%

Irrigation levels and use of hydro retainer polymer in greenhouse lettuce production

Silva

Salomão

Pereira

et al. 2019

Rev. bras. eng. agríc. ambient.

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One of the potential alternatives to improve the use of water resources is the use of hydro retainer polymer applied to the soil. The objective of this study was to evaluate how irrigation levels and doses of hydro retainer polymer interfere in the production of ’Vanda’ lettuce. The experiment was carried out from December 2017 to January 2018 under protected environment in the Instituto Federal Goiano, Urutaí Campus, Goiás State, GO, Brazil (17º 29’ 10” S of latitude, 48º 12’ 38” W of longitude and 697 m of altitude). The work tested four irrigation levels of 50, 75, 100 and 125% of the evaporation obtained daily by the hook micrometer and five doses of hydrogel polymer (0, 50, 100, 150 and 200 g plant-1). The experimental design was a randomized block design in a scheme of split-plot and four blocks. Canopy fresh and dry mass, plant height, number of leaves and productivity were evaluated. There was 29.24% increase in the dry mass comparing the hydro retainer polymer doses of 0 and 169.28 g and an increase of 14.36% of the height of plants when compared with the irrigation levels of 50 and 125%. The use of a hydro retainer polymer provided a significant increase in all the evaluated productive variables. The irrigation levels influence the fresh mass from aerial part, plant height and productivity. The productivity increased 18.42% for the irrigation levels used and the highest estimated values were presented in the dose of 157.49 g (14.46 t ha-1) hydro retainer polymer.

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Section: Resultsmentioning

confidence: 99%

Irrigation levels and use of hydro retainer polymer in greenhouse lettuce production

Silva

Salomão

Pereira

et al. 2019

Rev. bras. eng. agríc. ambient.

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“…NOBRE et al (2009) avaliaram o crescimento e a produção de cultivares de alface em condições de solo saturado e constataram que elevado conteúdo de água no solo limita o acúmulo de fitomassa da parte aérea e das raízes da alface. …”

Section: Resultsunclassified

Cultivo de alface em solos com hidrogel utilizando irrigação automatizada

Santos¹,

Carvalho

Souza

et al. 2015

Eng. Agríc.

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RESUMO:Visando à otimização do uso da água na produção de alimentos, este artigo teve como objetivo avaliar o desempenho da TDR e de um acionador automático para irrigação na produção da alface em solos com diferentes doses de um polímero hidrofílico. Em casa de vegetação, foram realizados dois ensaios em vasos de 3 litros cultivados com alface. O primeiro foi realizado na primavera de 2011, utilizando 2 texturas de solo (arenosa e argilosa) e a presença/ausência do hidrogel. O segundo ensaio foi realizado no outono de 2012, utilizando 4 doses de hidrogel (0; 8; 16 e 24 g por vaso) no solo de textura arenosa. Aos 38 (2011) e 44 (2012) dias após o transplantio (DAT) das mudas, foram realizadas as colheitas e a avaliação das plantas cultivadas. O hidrogel não representou uma fonte de erros para o funcionamento da TDR, e o dispositivo acionador automático para irrigação respondeu adequadamente à presença do hidrogel nos solos com diferentes texturas. Em geral, foi verificada maior eficiência do uso da água nas plantas desenvolvidas na presença do hidrogel. As plantas cultivadas em solo com 16 g por vaso de hidrogel destacaram-se em massa seca e fresca da parte aérea. PALAVRAS-CHAVE: polímero hidrofílico, TDR, automação e gotejamento. LETTUCE GROWING UNDER AUTOMATED IRRIGATION AND HYDROGEL APPLICATIONABSTRACT: This paper aimed at evaluating the performance of a time domain reflectometry (TDR) and automation of an irrigation system to optimize water use in lettuce production in soils with different doses of hydrogel. For that, two greenhouse experiments were carried out with lettuce seedlings in 3-L pots. The first experiment was performed during the spring of 2011 using two soil textures (sandy and clayey) and presence or absence of hydrogel. The second one was made in the fall of 2012 using four doses of hydrogel (0, 8, 16 and 24 g per pot) in a sandy textured soil. The evaluations were carried out at 38 (2011) and 44 (2012) days after transplanting (DAT) of the seedlings. Results showed that hydrogel application did not affect the TDR performance. In addition, the automatic trigger device used for irrigation had adequate resposnses to hydrogel application in both soils. Overall, plants grew better in soils treated with hydrogel and the application of 16 g hydrogel per pot stood out since provided larger amounts of fresh and dry matter of plant shoot.

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Addressing the threat of climate change to agriculture requires improving crop resilience to short-term abiotic stress

et al. 2018

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Climate change represents a serious threat to global agriculture, necessitating the development of more environmentally resilient crops to safeguard the future of food production. The effects of climate change are appearing to include a higher frequency of extreme weather events and increased day-to-day weather variability. As such, crops which are able to cope with short-term environmental stress, in addition to those that are tolerant to longer term stress conditions are required . It is becoming apparent that the hitherto relatively little studied process of post-stress plant recovery could be key to optimizing growth and production under fluctuating conditions with intermittent transient stress events. Developing more durable crops requires the provision of genetic resources to identify useful traits through the development of screening protocols. Such traits can then become the objective of crop breeding programmes. In this study, we discuss these issues and outline example research in leafy vegetables that is investigating resilience to short-term abiotic stress.

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Crescimento da alface sob saturação temporal do solo

Cited by 3 publications

References 11 publications

Irrigation levels and use of hydro retainer polymer in greenhouse lettuce production

Irrigation levels and use of hydro retainer polymer in greenhouse lettuce production

Cultivo de alface em solos com hidrogel utilizando irrigação automatizada

Addressing the threat of climate change to agriculture requires improving crop resilience to short-term abiotic stress

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